US5637251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Functional additive composition based on organic amine salts for coolants
Assignee: Vanderbilt Chemicals LLC
•
Filing: 1995-07-31
•
Granted: 1997-06-10
•
Expires: 2015-07-31
Abstract
Abstract This invention relates to a water-based antifreeze or coolant composition having improved antioxidant and anticorrosion properties and comprising a major amount of an aqueous solution of a polyhydric alcohol and a minor amount of a functional additive composition consisting of monoallylamine salt of 2,5-dimercapto-1,3,4-thiadiazole and monoallylamine salt of benzoic acid.
Inventors
- 👤 Thomas J. Karol
- 👤 Steven G. Donnelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:23
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
A water-based antifreeze or coolant composition having improved antioxidant and anticorrosion properties and comprising a major amount of an aqueous solution of a polyhydric alcohol and about 0.01 to 5.0 percent of a functional additive composition consisting of monoallylamine salt of 2,5-dimercapto-1,3,4-thiadiazole and monoallylamine salt of benzoic acid in the mole ratio of the thiadiazole to the acid ranging from about 1:1 to 2:3.
Claim 2
Dependent Claim
64 words
A water-based antifreeze or coolant composition having improved antioxidant and anticorrosion properties and comprising a major amount of an aqueous solution of a polyhydric alcohol and about 0.01 to 5.0 percent of a functional additive composition consisting of monoallylamine salt of 2,5-dimercapto-1,3,4-thiadiazole and monoallylamine salt of benzoic acid in the mole ratio of the thiadiazole to the acid ranging from about 1:1 to 2:3.
Claim 3
Dependent Claim
33 words
An antifreeze or coolant composition according to claim 1 wherein the polyhydric alcohol is selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, triethylene glycol or their mixtures.
Claim 4
Independent Claim
71 words
A method for protecting engine coolant parts from corrosion which comprises contacting their surfaces with a cooling or antifreeze composition comprising a major amount of an aqueous solution of a polyhydric alcohol and about 0.01 to 5.0 percent of a functional additive composition consisting of monoallylamine salt of 2,5-dimercapto-1,3,4-thiadiazole and monoallylamine salt of benzoic acid in the mole ratio of the thiadiazole to the acid ranging from about 1:1 to 2:3.
Claim 5
Independent Claim
71 words
A method for protecting engine coolant parts from corrosion which comprises contacting their surfaces with a cooling or antifreeze composition comprising a major amount of an aqueous solution of a polyhydric alcohol and about 0.01 to 5.0 percent of a functional additive composition consisting of monoallylamine salt of 2,5-dimercapto-1,3,4-thiadiazole and monoallylamine salt of benzoic acid in the mole ratio of the thiadiazole to the acid ranging from about 1:1 to 2:3.
References Cited (Backward Citations)
US2910439A
Cited
US3966623A
Cited
GB1560830A
Cited
US4219433A
Cited
US4233176A
Cited
US5085793A
Cited
US5368758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-09 | 2000-12-09 | 2001-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-09 | 2004-12-09 | 2005-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-09 | 2008-12-09 | 2009-06-10 | $7700.00 | Window Closed / Lapsed |